<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
</head>

<body>
    <div id="app">

        <button @click='btn1'>点击请求</button>
        <button @click='btn2'>查看</button>
    </div>


    <script>
   
        var app = new Vue({
            el: '#app',
            data: {
                message: 'Hello Vue22222!',
                city:[]
            },
            methods:{
                btn1(){
                    fetch('http://localhost:5003/httpvue')
                    .then(res=>res.json())
                    .then(data=>this.city =   data.msg)
                },
                btn2(){
                    console.log(this.city)
                }
            }
        })

        console.log('app', app)

    </script>
</body>

</html>